Aniline-black discharge



WiLLlAlii '1. NHETEHEAD, OF MAGOG,

i rirsu'r rerun,

GANADA, ASSIGNOR OF GNE-HALF Ti} HENRY I DU?EE, OF BOSTON, MASSACHUSETTS.

ANlLliziE-BLACK W$CHAFGE= SPECIFICATLOII famine" part of Letters Patent E o. elfififiii, drained 311116 13, E98.

Application filed February 21, 1898.

To a, whom it may concern."

Belt known that- LWILLIAM T. Wnrrnuusn, a subject of the Queen of Great Britain, residing at Magog, in the Province of Quebec, Dominion of Canada, have invented an Innprovement in Aniline-Black Discharge, of which the following is a specification.

My invention relates to the production of white or colored patternsor figures in cloth [0 by a discharge on an aniline-blacli'gronnd, and my invention has .for, its object the method of producing cloth having such patterns or figures, substantially as will be described.

I first print, blotch, slop-pad, or dye the cloth until it is thoroughly saturated with a solution of aniline-black produced by anilineoil or salts of aniline according to any of the well known receipes therefor. 'lhe cloth is 2:: then dried sufiei'ently to prevent the color from spreading, and I then print the pattern thereon in my improved discharge, in the usual manner. The aniline-blaclr is thereafter developed by passing the cloth through an aniline-aging machine, or by steaming with or without pressure. If desired, the cloth may be soaped, dried and finished in the usual manner, During the process of developing the aniline-black color the portions 0 of the cloth covered by the discharge throw off the black ground color, and the finished cloth presents the pattern clearly and sharply defined, without blurring or clouding. If the pattern is to be white I make the discharge 5 mixture by taking six. pounds, more or less, of metallic zinc in a finely divided condition,

or a like quantity of a zinc compound, such as the oxide, hydrate orcarbonate, to provide zinc which is'the essential or active element 40 of the discharge, one-half gallon of water, and one and one-half gallons of starch paste (one pound of starch per gallon). The finely divided metallic zinc, or the zinc compound, and the water are thoroughly mixed, and the 5 starch paste is added to givethe requisite thickness for proper printing. This discharge is printed on the cloth in any well known manner, in the desired pattern or figure.

if the pattern or figure is to be colored, a

so pigment color, coaltar color, dye-Wood or Serial H0. 463,250. (Bio speei ncns.)

berry extract is added to the discharge micrture.

The zinc, whether present in its metallic state or as a compound, is the essential or active elernentot the discharge, andtendsto fasten or fix the color, but it may he still further fastened by adding albumen to the mixture -in such quantity and proportion as the i nature of the particular case demands.

In the use of a pigment color, I use four quarts gu in tragacanth e0lution,(three ounces per gallon), in the foregoing mixture, instead of the starch paste, as a thickener, and arter the finely divided zinc, or a zinc compound, and the water have been thoroughiyinixed, I add the thickener and-the color, the quantity of the latter varying according to the depth of the shade desired andthe nature oi the pigment itself.

in nsingultrarnarine blue, for instance, 1 take aboutsix pounds thereof for the mixture hereinbefore described.

The color may he produced from a coal-tar color, as for instance safranine, and i then take about six pounds of finely divided me- ,tallic zinc or a zinc compound, one and one eighth gallons of Water, one and one-half pounds of starch,and nine ounces sairauine, mix thoroughly and boil.

Any one of the coal-tar colors having the property of fixing itself to the fa'nric when used in combination with finely divided metallic zinc or a zinc compound, may be eruployed, such as Bismarck brown, methyl blue,

methyl violet, &c. I v I have found in my experiments that most ofthe so-called basic colors will fix properly with metallic z'inc as the essential or active element of the discharge, but some of the acid colorsfisuch as soluble blue and violet 9c and acid magenta fail to properly fix with the oxide and produce good results.

To produce the color from dyewood or berry extract, I may take, i'or instance, about six pounds of finely divided metallic zinc, or one of the zinc-compounds, and. mix it with one and one-half gallons water, adding thereto three pints Persian oerry extract, 48 Twad die, a suificient amount of starch to produce a good impression on the cloth, and one pint too 2 v eeeeei Well together, and varying the quantity of Persian berry according to-the shade desired. Extracts of logwood, sepan, fustic, quercitron, bark, 800., may be used to produce other colors.-

"lhe metallic zinc, to obtain the best results,

should be very finely divided and ground to. an iinpelpeble owder previous to its addi;

tion to theheroinbefore described mixture.

In another concurrently pending application, Serial No.458,58l, filed January 16, 1893, I have described and specifically claimed the use of a compound of zinc to supply the zinc which is the essential element or" the discharge mixture.

I do not desire to confine myself to the exnot quantity of metallic zinc or of the zinc compound to be used, nor to the other ingredients, as the same may be varied without departing from my invention, the gist of which consists in the employment of zinc as the essential or active element in the discharge,

I claim- 1. The herein described process of. produc ing cloth having patterns on aniline-black grounds, which consists in treating the cloth with a, solution of aniline-black color, drying sufficiently to keep the color fre-in runni'ng,

and printing the pattern thereon in eflifiggc charge containing zinc as its essential or active element, heforc'oxiilation of the aniline color, Substantially as described.

The herein described process of producing cloth having colored patterns on aniline black grounds, which consists in treating the cloth with a. solution of aniline-black color, drying sufficiently to keep the color from running, and printing the pattern a discharge containing zinc as its essential or active element, and a color, hefore'oxidation of the aniline-black color, substantial! en loscribed.

in testimony whereof I have signed my name to this specification in the presenoe'lof twosubscribing witnesses.

WILLIAM T. Witnesses:

JAs. DOLPHIN, HUGH Jlminson.

thereon in 

